return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CHFCHCl ((E)-1-chloro-2-fluoroethene)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-636.495956
Energy at 298.15K-636.498063
HF Energy-635.795413
Nuclear repulsion energy140.591967
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3293 3110 10.25      
2 A' 3278 3096 5.25      
3 A' 1718 1623 27.55      
4 A' 1346 1271 0.33      
5 A' 1240 1172 2.81      
6 A' 1194 1127 154.29      
7 A' 908 857 42.16      
8 A' 459 434 1.80      
9 A' 270 255 5.79      
10 A" 953 901 41.39      
11 A" 815 770 12.12      
12 A" 281 265 1.56      

Unscaled Zero Point Vibrational Energy (zpe) 7878.0 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 7440.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/6-31G(2df,p)
ABC
1.80659 0.08261 0.07900

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.487 0.000
C2 1.017 -0.369 0.000
Cl3 -1.625 -0.081 0.000
F4 2.276 0.062 0.000
H5 0.131 1.559 0.000
H6 0.920 -1.447 0.000

Atom - Atom Distances (Å)
  C1 C2 Cl3 F4 H5 H6
C11.32941.72182.31491.07992.1417
C21.32942.65801.33082.12221.0821
Cl31.72182.65803.90372.40272.8889
F42.31491.33083.90372.61552.0289
H51.07992.12222.40272.61553.1080
H62.14171.08212.88892.02893.1080

picture of (E)-1-chloro-2-fluoroethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 120.966 C1 C2 H6 124.970
C2 C1 Cl3 120.640 C2 C1 H5 123.154
Cl3 C1 H5 116.206 F4 C2 H6 114.064
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability